A is thrice as good a workman as B and so takes 60 days less than B for doing a job.The time in which they can do the job together is
A is thrice as good a workman as B and so takes 60 days less than B for doing a job.The time in which they can do the job together is
A 30 days
B60 days
C$22 \frac{1}{2}$ days
D45 days
